xref: /llvm-project/llvm/test/ThinLTO/X86/ref-ifunc.ll (revision fa9b1be45088dce1e4b602d451f118128b94237b)
1; RUN: opt -module-summary %s -o %t.bc
2
3; RUN: llvm-dis %t.bc -o - | FileCheck %s
4
5; Tests that var and caller are not eligible to import and they don't have refs to ifunc 'callee'
6
7; CHECK: gv: (name: "var", summaries: (variable: ({{.*}}, flags: ({{.*}}notEligibleToImport: 1
8; CHECK-NOT: refs
9; CHECK-SAME: guid = 7919382516565939378
10
11; CHECK: gv: (name: "caller", summaries: (function: ({{.*}}, flags: ({{.*}}notEligibleToImport: 1
12; CHECK-NOT: refs
13; CHECK-SAME: guid = 16677772384402303968
14
15target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
16target triple = "x86_64-unknown-linux-gnu"
17
18@__cpu_model = external global { i32, i32, i32, [1 x i32] }
19
20@callee = internal ifunc void(), ptr @callee.resolver
21
22@var = constant { [1 x ptr] } { [1 x ptr] [ptr @callee]}
23
24define void @dispatch(ptr %func) {
25    tail call void %func()
26    ret void
27}
28
29define void @caller() {
30  tail call void @dispatch(ptr @callee)
31  ret void
32}
33
34define internal ptr @callee.resolver() {
35resolver_entry:
36  tail call void @__cpu_indicator_init()
37  %0 = load i32, ptr getelementptr inbounds ({ i32, i32, i32, [1 x i32] }, ptr @__cpu_model, i64 0, i32 3, i64 0)
38  %1 = and i32 %0, 1024
39  %.not = icmp eq i32 %1, 0
40  %func_sel = select i1 %.not, ptr @callee.default.1, ptr @callee.avx2.0
41  ret ptr %func_sel
42}
43
44define internal void @callee.default.1(i32 %a) {
45  ret void
46}
47
48define internal void @callee.avx2.0(i32 %a) {
49  ret void
50}
51
52declare void @__cpu_indicator_init()
53